| 1 | /* tc-ppc.h -- Header file for tc-ppc.c. |
| 2 | Copyright (C) 1994 Free Software Foundation, Inc. |
| 3 | Written by Ian Lance Taylor, Cygnus Support. |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to |
| 19 | the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | #define TC_PPC |
| 22 | |
| 23 | #ifndef BFD_ASSEMBLER |
| 24 | #error PowerPC support requires BFD_ASSEMBLER |
| 25 | #endif |
| 26 | |
| 27 | /* If OBJ_COFF is defined, and TE_PE is not defined, we are assembling |
| 28 | XCOFF for AIX or PowerMac. If TE_PE is defined, we are assembling |
| 29 | COFF for Windows NT. */ |
| 30 | |
| 31 | #ifdef OBJ_COFF |
| 32 | #ifndef TE_PE |
| 33 | #define OBJ_XCOFF |
| 34 | #endif |
| 35 | #endif |
| 36 | |
| 37 | /* The target BFD architecture. */ |
| 38 | #define TARGET_ARCH (ppc_arch ()) |
| 39 | extern enum bfd_architecture ppc_arch PARAMS ((void)); |
| 40 | |
| 41 | /* Whether or not the target is big endian */ |
| 42 | extern int target_big_endian; |
| 43 | |
| 44 | /* The target BFD format. */ |
| 45 | #ifdef OBJ_COFF |
| 46 | #ifdef TE_PE |
| 47 | #define TARGET_FORMAT (target_big_endian ? "pe-powerpc" : "pe-powerpcle") |
| 48 | #else |
| 49 | #define TARGET_FORMAT "aixcoff-rs6000" |
| 50 | #endif |
| 51 | #endif |
| 52 | |
| 53 | /* PowerMac has a BFD slightly different from AIX's. */ |
| 54 | #ifdef TE_POWERMAC |
| 55 | #ifdef TARGET_FORMAT |
| 56 | #undef TARGET_FORMAT |
| 57 | #endif |
| 58 | #define TARGET_FORMAT "xcoff-powermac" |
| 59 | #endif |
| 60 | |
| 61 | #ifdef OBJ_ELF |
| 62 | #define TARGET_FORMAT (target_big_endian ? "elf32-powerpc" : "elf32-powerpcle") |
| 63 | #endif |
| 64 | |
| 65 | /* Permit temporary numeric labels. */ |
| 66 | #define LOCAL_LABELS_FB 1 |
| 67 | |
| 68 | /* $ is used to refer to the current location. */ |
| 69 | #define DOLLAR_DOT |
| 70 | |
| 71 | /* Strings do not use backslash escapes under COFF. */ |
| 72 | #ifdef OBJ_COFF |
| 73 | #define NO_STRING_ESCAPES |
| 74 | #endif |
| 75 | |
| 76 | /* When using COFF, we determine whether or not to output a symbol |
| 77 | based on sy_tc.output, not on the name. */ |
| 78 | #ifdef OBJ_XCOFF |
| 79 | #define LOCAL_LABEL(name) 0 |
| 80 | #endif |
| 81 | #ifdef OBJ_ELF |
| 82 | /* When using ELF, local labels start with '.'. */ |
| 83 | #define LOCAL_LABEL(name) (name[0] == '.' \ |
| 84 | && (name[1] == 'L' || name[1] == '.')) |
| 85 | #define FAKE_LABEL_NAME ".L0\001" |
| 86 | #define DIFF_EXPR_OK /* .-foo gets turned into PC relative relocs */ |
| 87 | #endif |
| 88 | |
| 89 | /* Set the endianness we are using. Default to big endian. */ |
| 90 | #ifndef TARGET_BYTES_BIG_ENDIAN |
| 91 | #ifndef TARGET_BYTES_LITTLE_ENDIAN |
| 92 | #define TARGET_BYTES_BIG_ENDIAN 1 |
| 93 | #endif |
| 94 | #endif |
| 95 | |
| 96 | #ifdef TARGET_BYTES_BIG_ENDIAN |
| 97 | #define PPC_BIG_ENDIAN 1 |
| 98 | #else |
| 99 | #define PPC_BIG_ENDIAN 0 |
| 100 | #endif |
| 101 | |
| 102 | /* We don't need to handle .word strangely. */ |
| 103 | #define WORKING_DOT_WORD |
| 104 | |
| 105 | /* We set the fx_done field appropriately in md_apply_fix. */ |
| 106 | #define TC_HANDLES_FX_DONE |
| 107 | \f |
| 108 | #ifdef TE_PE |
| 109 | |
| 110 | /* Question marks are permitted in symbol names. */ |
| 111 | #define LEX_QM 1 |
| 112 | |
| 113 | /* Don't adjust TOC relocs. */ |
| 114 | #define tc_fix_adjustable(fixp) ppc_pe_fix_adjustable (fixp) |
| 115 | extern int ppc_pe_fix_adjustable PARAMS ((struct fix *)); |
| 116 | |
| 117 | #endif |
| 118 | |
| 119 | #ifdef OBJ_XCOFF |
| 120 | |
| 121 | /* Declarations needed when generating XCOFF code. XCOFF is an |
| 122 | extension of COFF, used only on the RS/6000. Rather than create an |
| 123 | obj-xcoff, we just use obj-coff, and handle the extensions here in |
| 124 | tc-ppc. */ |
| 125 | |
| 126 | /* We need to keep some information for symbols. */ |
| 127 | struct ppc_tc_sy |
| 128 | { |
| 129 | /* We keep a few linked lists of symbols. */ |
| 130 | struct symbol *next; |
| 131 | /* Non-zero if the symbol should be output. The RS/6000 assembler |
| 132 | only outputs symbols that are external or are mentioned in a |
| 133 | .globl or .lglobl statement. */ |
| 134 | int output; |
| 135 | /* The symbol class. */ |
| 136 | int class; |
| 137 | /* The real name, if the symbol was renamed. */ |
| 138 | char *real_name; |
| 139 | /* For a csect symbol, the subsegment we are using. This is zero |
| 140 | for symbols that are not csects. */ |
| 141 | subsegT subseg; |
| 142 | /* For a csect or common symbol, the alignment to use. */ |
| 143 | int align; |
| 144 | /* For a function symbol, a symbol whose value is the size. The |
| 145 | field is NULL if there is no size. */ |
| 146 | struct symbol *size; |
| 147 | /* For a csect symbol, the last symbol which has been defined in |
| 148 | this csect, or NULL if none have been defined so far. For a .bs |
| 149 | symbol, the referenced csect symbol. */ |
| 150 | struct symbol *within; |
| 151 | }; |
| 152 | |
| 153 | #define TC_SYMFIELD_TYPE struct ppc_tc_sy |
| 154 | |
| 155 | /* We need an additional auxent for function symbols. */ |
| 156 | #define OBJ_COFF_MAX_AUXENTRIES 2 |
| 157 | |
| 158 | /* Square and curly brackets are permitted in symbol names. */ |
| 159 | #define LEX_BR 3 |
| 160 | |
| 161 | /* Canonicalize the symbol name. */ |
| 162 | #define tc_canonicalize_symbol_name(name) ppc_canonicalize_symbol_name (name) |
| 163 | extern char *ppc_canonicalize_symbol_name PARAMS ((char *)); |
| 164 | |
| 165 | /* Get the symbol class from the name. */ |
| 166 | #define tc_symbol_new_hook(sym) ppc_symbol_new_hook (sym) |
| 167 | extern void ppc_symbol_new_hook PARAMS ((struct symbol *)); |
| 168 | |
| 169 | /* Set the symbol class of a label based on the csect. */ |
| 170 | #define tc_frob_label(sym) ppc_frob_label (sym) |
| 171 | extern void ppc_frob_label PARAMS ((struct symbol *)); |
| 172 | |
| 173 | /* TOC relocs requires special handling. */ |
| 174 | #define tc_fix_adjustable(fixp) ppc_fix_adjustable (fixp) |
| 175 | extern int ppc_fix_adjustable PARAMS ((struct fix *)); |
| 176 | |
| 177 | /* We need to set the section VMA. */ |
| 178 | #define tc_frob_section(sec) ppc_frob_section (sec) |
| 179 | extern void ppc_frob_section PARAMS ((asection *)); |
| 180 | |
| 181 | /* Finish up the symbol. */ |
| 182 | #define tc_frob_symbol(sym, punt) punt = ppc_frob_symbol (sym) |
| 183 | extern int ppc_frob_symbol PARAMS ((struct symbol *)); |
| 184 | |
| 185 | /* Finish up the entire symtab. */ |
| 186 | #define tc_adjust_symtab() ppc_adjust_symtab () |
| 187 | extern void ppc_adjust_symtab PARAMS ((void)); |
| 188 | |
| 189 | /* Niclas Andersson <nican@ida.liu.se> says this is needed. */ |
| 190 | #define SUB_SEGMENT_ALIGN(SEG) 2 |
| 191 | |
| 192 | #endif /* OBJ_XCOFF */ |
| 193 | |
| 194 | #ifdef OBJ_ELF |
| 195 | /* The name of the global offset table generated by the compiler. Allow |
| 196 | this to be overridden if need be. */ |
| 197 | #ifndef GLOBAL_OFFSET_TABLE_NAME |
| 198 | #define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_" |
| 199 | #endif |
| 200 | |
| 201 | /* Branch prediction relocations must force relocation */ |
| 202 | #define TC_FORCE_RELOCATION_SECTION(FIXP,SEC) \ |
| 203 | ((FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRTAKEN \ |
| 204 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_B16_BRNTAKEN \ |
| 205 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRTAKEN \ |
| 206 | || (FIXP)->fx_r_type == BFD_RELOC_PPC_BA16_BRNTAKEN \ |
| 207 | || ((FIXP)->fx_addsy && !(FIXP)->fx_subsy && (FIXP)->fx_addsy->bsym \ |
| 208 | && (FIXP)->fx_addsy->bsym->section != SEC)) |
| 209 | |
| 210 | /* Support for SHF_EXCLUDE and SHT_ORDERED */ |
| 211 | extern int ppc_section_letter PARAMS ((int, char **)); |
| 212 | extern int ppc_section_type PARAMS ((char **)); |
| 213 | extern int ppc_section_word PARAMS ((char **)); |
| 214 | extern int ppc_section_flags PARAMS ((int, int, int)); |
| 215 | |
| 216 | #define md_elf_section_letter(LETTER, PTR_MSG) ppc_section_letter (LETTER, PTR_MSG) |
| 217 | #define md_elf_section_type(PTR_STR) ppc_section_type (PTR_STR) |
| 218 | #define md_elf_section_word(PTR_STR) ppc_section_word (PTR_STR) |
| 219 | #define md_elf_section_flags(FLAGS, ATTR, TYPE) ppc_section_flags (FLAGS, ATTR, TYPE) |
| 220 | #endif /* OBJ_ELF */ |
| 221 | |
| 222 | /* call md_apply_fix3 with segment instead of md_apply_fix */ |
| 223 | #define MD_APPLY_FIX3 |
| 224 | |
| 225 | /* call md_pcrel_from_section, not md_pcrel_from */ |
| 226 | #define MD_PCREL_FROM_SECTION(FIXP, SEC) md_pcrel_from_section(FIXP, SEC) |
| 227 | |
| 228 | #define md_operand(x) |
| 229 | |